Posted on June 08, 2017 at 09:28I am having troubles with making a USB CDC device of a Nucleo-L073.
I have downloaded the STM32Cube_FW_L0_V1.9.0 projects and have tried building and running the \STM32L073Z_EVAL\Applications\USB_Device\HID_Standalone\MDK-ARM project in Keil.
I disconnect the USB cable from the ST-link and move jumper JP5 to PWR E5V, and connect my USB cable to E5V and GND on pin row and connect +/-data to A11/12 (have also tried A12/11). Every time I connect to the PC I get an USB error message 'Unknown device' code 29.
X2 is mounted on my Nucleo, is that sufficient for USB? Or do i need the X3 instead?
Have someone successfully made a CDC or HID device from a Nucleo-L073? or with a STM32L072?
/* Init Device Library */
USBD_Init(&USBD_Device, &VCP_Desc, 0);
/* Add Supported Class */
USBD_RegisterClass(&USBD_Device, USBD_CDC_CLASS);
/* Add CDC Interface Class */
USBD_CDC_RegisterInterface(&USBD_Device, &USBD_CDC_fops);
/* Start Device Process */
USBD_Start(&USBD_Device);
#usb #usb-cdc #cdc #cdc-device #stm32l073 #nucleo-l073? #nucleo
